1. Department of Geology and Environmental Earth Science; Miami University; Oxford OH USA
2. State Key Laboratory of Biogeology and Environmental Geology; China University of Geosciences; Wuhan China
3. State Key Laboratory of Biogeology and Environmental Geology; China University of Geosciences; Beijing China
4. Resource Management Department; Energy Development Corporation Ortigas Center; Pasig Philippines
5. National Institute of Geological Sciences; University of the Philippines; Diliman Philippines
6. Division of Earth Sciences; National Science Foundation; Arlington VA USA